The following sites will help you analyse/understand Your Twitter Account:
Twitter Grader - Twitter Grader is a free tool that allows you to check the power of your twitter profile compared to millions of other users that have been graded. Just enter your twitter username (password not needed) and you’ll get an instant grade and report. No muss, no fuss.
TwInfluence – TwInfluence is a simple tool for measuring the combined influence of twitterers and their followers, with a few social network statistics thrown in as bonus.
TwAnalyst – Your Twitter personality and style analysed. See your account statistics at a glance, and track them over time. Find out your readability index. Get useful advice for gaining more followers. Get recommendations for people to follow … or look up someone else’s account!
Twitter Counter – Get graphs of you followers, tweets and tweeple you follow… and also know the next days prediction.
TweetEffect – Find out which of your Twitter updates made people follow or leave you by simply entering your Twitter ID.
Twitter Sentiment - You can research on anything good or bad being said about any word on twitter using Twitter Sentiment analysis. eg:enter your username or any search word.
Twitalyzer - It is an analytics tool with which you determine whether your investment on twitter is justified or not. Once you access twitalyzer, you would need to enter the twitter id and depending on your followers & no. of tweets the results would be displayed in 1-2 minutes. The results are classified as the user’s impact value, engagement value, influence value etc.
TweetPsych – TweetPsych does some unique calculations e.g. predicting the tendency of a user to send more tweets in comparison to other users. Similarly it also calculates in percentage, the self reference value of a user (i.e. inferences made to themselves in their tweets).